Here's an example, just be sure to remove the asterisks(*) when you use it.

Code:
[*block align="center"] Text or Images to center [*/block]

Visual example:

Text or Images to center

are you sure to continue little question threads like this to be open as individual thread instead of having the general one? im sure sooner or later it would increase the total unused and short thread.
or at least just put them into categories rather than let people make their own thread